Spyder3 GigE Vision User Manual
03-032-20027-02
DALSA
56
Look-Up Tables
Note:
This information only applies to the 4k model camera.
The flat field corrections FPN and PRNU assume a linear response to the amount of light
by the sensor, output node, analog amplifier, and analog to digital converter. To correct
any non-linearity in this system of components a Look-Up Table (LUT) has been
implemented in the FPGA for each tap immediately after the ADC. The LUT adds a
signed value (-256 to +255) indexed by the 10 MSB of the input value.
Look-up tables (LUTs) are only used by the 4K mono cameras.
The user can enable or disable the LUT. LUTs are factory calibrated and cannot be altered.
They are designed to assist the analog amplifier in making its output linear.
The LUTs need to be recalibrated when the analog gain changes. This means that the
GainAbs
command is disabled in the 4K in order to prevent conflict issues.
The calibration will change with changes to sensitivity modes and direction. Therefore
DALSA automatically loads a calibrated LUT when there are changes to sensitivity and
direction.
5.8 Saving and Restoring Settings
For each camera operating mode (high sensitivity forward direction, high sensitivity
reverse direction, low sensitivity, or tall pixel), the camera has distinct factory settings,
current settings, and user settings. In addition, there is one set of factory pre-calibrated
pixel coefficients and up to four sets of user created pixel coefficients for each operating
mode.
Factory Settings
On first initialization, the camera operates using the factory settings. You can restore the
original factory settings at any time using the command
RestoreFactorySettings
.
GenICam features for restoring the factory setting:
RestoreFactorySettings
User Settings
You can save or restore your user settings to non-volatile memory using the following
commands. Pixel coefficients and LUTs are stored separately from other data.
•
To save all current user settings to EEPROM, use the command
WriteUserSetting
. The camera will automatically restore the saved user
settings when powered up.
Note:
While settings are being written to nonvolatile
memory, do not power down camera or camera memory may be corrupted.
•
To restore the last saved user settings, use the command
RestoreUserSetting
.
•
To save the current pixel coefficients, use the command
WritePRNUCoefficients
and
WriteFPNCoefficient
.
Summary of Contents for Spyder3 SG-11-01k40-00-R
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